I think/hope that everything works again - though I would love to know what went wrong.

I had noticed that, at the same time as the sudden inability to upload, a second change had occurred, though this one was more quaint than annoying: on vector maps roads sometimes "multiplied" and only normalised when I switched to a different map and back. (FYI I'll try to attach a screenshot of a simple one lane roundabout.)

So I felt that something must have really screwed up my version of Locus Map; I uninstalled/reinstalled, restored the backup I had just made - no change.

I uninstalled/reinstalled again, this time restoring a two weeks old backup - and everything works perfectly again.

please give a try to, just yesterday published, version 3.32.2. There were two problems: 1) system of OAuth based login, which stopped to work due to some changes I made around login to different service and 2) generated descriptions that were visible in OSM editor. Both problems should be fixed now.

Roads are interesting. I'm adding to this topic my colleague Petr, who take care of maps if there is something with me do with it. Thanks.

it's openandromaps (I tried all maps from 2017 and 2018 stored on my device; unfortunately, the only maps from your store on my device were several years old, and last night I deleted them. I might still have them on my PC's backup harddisc - not sure).

My theme is andromaps light, though I've just tried an internal theme (see below), and it is actually more extreme, because with that theme I don't just get a doubling of the road - the copy is of a different road type.

I had hoped that reinstalling the app and restoring an older backup would help - and I CAN once again upload stuff to OSM (as far as I remember, I installed the current version before doing this and still couldn't upload).

No such luck - the effect simply took a bit longer to appear.

It's always the same: when I start Locus Map, everything is normal; when I then move around the map for several minutes, the roads begin changing their appearance.

Switching back and forth between the internal themes "Straße" and "Stadt" has the two fakes appear before the box with tick marks has been dismissed; switching to "Ski" or "Wandern & Radfahren" has everything back to normal; I then had to move around the map for so long that I began hoping that "Ski" didn't show fakes at all.

Moving back to the R462 showed the fakes, but switching to "Online" and back made them vanish.

They stayed gone in "Straße" - until I zoomed in and out a bit, when they were drawn again.

well difficult to say. If you want to play it we could try some tests - for example remove all OpenAndroMap or LoMaps. Honestly I have never seen this yet. However would you please only check: Menu > Settings > Maps > Offline maps > Automatic map loading: is it enabled or disabled?

That's the question. Honestly I don't know. There is very likely some problem when Locus merge the maps but I don't know the reason. However we'll focus on it next week. Meanwhile is it possible for you to find minimal configuration? I mean to find only two maps that cause it?

Ireland is the ideal country for „OSM as a hobby” - wherever you go (except for some of the larger towns) you are likely to find just the most important data on the map - often only the major roads and maybe a node for a petrol station.

Ireland has been my favourite summer vacation country for decades; both together means that I've got ALL the Ireland maps since July 2012 (when I „found” OSM) in my MapsVector directory.

I think my best option will be to switch autoloading back on again and temporarily move all maps but the oldest and the newest to a different place on my external SD card.

isn't this just a simple problem caused by: when Locus Map autoload maps, it simply take data from both maps and draw them both!! If you use the same type of map, it is not a problem because they have the same data so it just draws two times same roads etc. Anyway, if the source of maps is not the same, it may cause these problems. One map probably uses more aggressive simplifications on roads and they then do not fit when placing one above the second. Solution? Use one source of vector maps or do not use automatic map loading.

The solution for me then is simply to keep autoload off, if I'm staying in my home area or in Ireland (in both areas I add at least hundreds of new data to OSM every year and like the easy way Locus has of loading maps of different age to see the development).

Right now I'm on the ferry, half way between Ireland and Wales, so it's switched on.